The diagram below shows a group of water molecules.
The water molecules in the diagram are attracted to each other by
Answer:
hydrogen bonds, the positive and negative charges of the hydrogen and oxygen atoms that make up water molecules makes them attracted to one another.
the minister in change of religious and charititable patreonage was known as
Answer:
sadr
Explanation:
Pls give brainlist
The equilibrium constant for the reaction shown below is Kc=0.0091. If the equilibrium concentrations of A and B are 0.031 M and 0.0823 M, respectively, what is the equilibrium concentration of C?
Answer:
[tex][C]=0.0221M[/tex]
Explanation:
Hello there!
In this case, according to the given chemical reaction at equilibrium:
[tex]3A\rightleftharpoons 3B+2C[/tex]
It is possible for us to set up the equilibrium expression as shown below:
[tex]Kc=\frac{[B]^3[C]^2}{[A]^3}[/tex]
Whereas Kc, [A] and [B] are known as 0.0091, 0.031M and 0.0823M and it is required to calculate [C]; thus, we solve for it as follows:
[tex][C]^2=\frac{[A]^3Kc}{B]^3}[/tex]
[tex][C]=\sqrt{\frac{(0.031)^3*0.0091}{(0.0823)^3}}[/tex]
[tex][C]=0.0221M[/tex]
Best regards!
pls help !! - Using the graph below, what is the rule for a translation form point A to point D?
Answer:
Graph? Question is incomplete.
Two hydrogen atoms covalently bond to form a hydrogen molecule.
What is true about the hydrogen molecule?
A-The hydrogen molecule can have more or less energy than the hydrogen atoms.
B-The hydrogen molecule has less energy than the two atoms.
C-The hydrogen molecule has the same energy as the two atoms.
Answer:
B
Explanation:
the energy of two separate hydrogen atoms decreases as they approach each other, and the single electrons on each atom are shared to form a covalent bond.
Scientists create models for all of the following reasons, EXCEPT
A - because a model can represent objects too large to comprehend
B - because a model can help to communicate their ideas
C - because a model is the only way to conduct an experiment
D - because a model is the only way to represent objects too small to see
Arteries
have very thin walls
o appear bluish in color
o carry blood away from the heart
connect capillaries and veins
Answer:
carry blood away from the heart
Study the map. Then use the drawing tool to create a model of how the two air masses look when they interact at front 1.
Answer: Picture
Explanation: I got it right
Answer:
2 and 3 look like a cold front in front of 1.
Explanation:
3 is an occluded front which occurs when a cold air mass devours a warm air mass and then collides with another cold mass. 2 is a warm air mass, and 1 is a cold air mass.
The total pressure is distinct from the individual partial pressures of a mixture.
A. True
B. False
Answer:
the answer is true :)
PLEASE HELP!!!!
Which bond would be the least polar?
1) H-Br (hydrogen-bromine)
2) H-F (hydrogen-fluorine)
3) H-H (hydrogen-hydrogen)
4) H-O (hydrogen-oxygen)
Answer:
[tex]\boxed {\boxed {\sf 3. \ H-H}}[/tex]
Explanation:
To determine the polarity of a bond, we use the electronegativities of the individual atoms. The greater the difference, the more polar the bond.
1. H-Br
Hydrogen: 2.2 Bromine: 3.03.0-2.2=0.8
2. H-F
Hydrogen: 2.2 Fluorine: 4.04.0-2.2=1.8
3. H-H
Hydrogen: 2.22.2-2.2=0.0
4. H-O
Hydrogen: 2.2Oxygen: 3.43.4-2.2=1.2
As we can see, the lowest difference is in hydrogen hydrogen at 0.0. You may also recognize that because they are 2 atoms of the same element, the electronegativity is the same for both, so it will equal 0. Since the electronegativity is 0, this is a nonpolar bond.
An eraser is an example of —
Group of answer choices
an insulator
a closed circuit
a conductor
an open circuit
Answer:
Insulator
Explanation:
An eraser can't conduct electricity, which makes it an insulator.
what is a fossil? and what can a fossil tell us about an organism
what is elastic energy
Answer:Elastic energy is energy stored in an object for temporary strain. It is basically potential energy.
A chemical equation representing the reaction of water (HOH) and hydrochloride acid (HCI) is shown.
HOH + HCl + Cl + H2O
Which of the following statements best explains the chemical action of the reactants in the equation?
Answer:
That is Hydrolysis reaction.
[tex]HCl _{(aq)} \: + \: _{(aq)} \: - - > \: H ^{ + }_{(aq)} \: + \: Cl {}^{ - } _{(aq)}[/tex]
Please help me!!!!!!!!! :-]
Please help me out here please
What quantity of copper is deposited by the same quantity of electricity that deposited 9g of aluminum
Answer:
Mass of copper deposited = 31.75 g
Explanation:
According to Faraday's second law of electrolysis, when the same quantity of electricity is passed through different electrolytes, the relative number of moles of the elements deposited are inversely proportional to the charges on the ions of the elements.
From this law, it can be seen that the higher the charge, the lower the number of moles of a given element deposited.
Number of moles of aluminium in 9 g of aluminium = mass / molar mass
Molar mass of aluminium = 27 g
Number of moles of aluminium = 9/27 = 1/3 moles
Charge on aluminium ion = +3
3 moles of electrons will discharge 1 mole of aluminium,
1 mole of electrons will discharge 1/3 moles of aluminium
Number of moles of electrons involved = 1 mole of electrons
Charge on copper ion = +2
1 mole of electrons will discharge 1/2 moles of copper.
Mass of 1/2 moles of copper = number of moles × molar mass of copper
Molar mass of copper = 63.5 g
Mass of copper deposited = 1/2 × 63.5 = 31.75 g
In order to develop ideas for a new tennis racket, a design team visits three different sporting goods stores. What part of the desining process is this?
Answer:
Generate concept.
Explanation:
The process of designing includes many processes out of which the process of developing the idea for a new product is called Generate concept.
Product idea( concept) generation is a act that begins with a list of criteria set by the client regarding his necessities and preferences. Based on the criteria, concept generation aims to pinpoint a range of potential ideas and solutions that addresses those needs.
Which is the correct result of mitosis and
meiosis?
Answer:
[tex]\boxed {\boxed {\sf B. \ 2 \ diploid \ cells \ and \ 4 \ haploid \ cells}}[/tex]
Explanation:
Mitosis is a type of cell division. It occurs in somatic cells, which are basically any cells other than sex cells. A cell replicates the genetic material then undergoes one division to create 2 identical cells, both with a complete set of chromosomes. These are known as diploid cells.
Meiosis is another type of cell division, but it occurs only in sex cells, called gametes. The cell replicates the genetic material and the chromosomes cross over, which creates completely unique cells. The cell divide to create 2 cells, but then they divide again to create 4 cells. They each have half of the chromosomes of a somatic cell, so they are haploid cells
So, mitosis results in 2 diploid cells and meiosis forms 4 haploid cells.
Summer happens in Vermont when the sun's rays hit it less or more directly than any other time of year .
Answer:
More directly.
Explanation:
Summer happens in Vermont when the sun's rays hit it more directly than any other time of year because this direct angle causes more warm environment. In the winter season, the angle of sun is about 45° due to which the place receives less solar radiation and the environment is cold while on the other hand, in the summer season the angle of the sun is about 90° due to which direct sunlight occurs on the region that causes warm and hot environment.
What charge is mobile within atoms and can be transferred between atoms?
Answer:
For example, when atoms lose or gain electrons they become charged particles called ions. Three ways electrons can be transferred are conduction, friction, and polarization. In each case, the total charge remains the same. This is the law of conservation of charge.
Explanation:
PLEASE HELP AND FAST!! How many grams of NH4OH are in 0.125L of a 1.4 M solution of NH4OH?
Answer:
6.132
Explanation:
how does salt alter the boiling point and freezing point of water
Answer:
adding salt is like adding an impurity therefore the boiling point might increase from 100°c to maybe 102°c
How does the volume of water change the solubility of sodium chloride in simple words?
Answer:
When sodium chloride dissolves in water to make a saturated solution there is a 2.5 per cent reduction in volume. ... The solubility of salt does not change much with temperature, so there is little profit in using hot water.
When a reaction is balanced we know that the number of _______ is the same on both sides of the reaction.
Answer:
Atoms I think
Explanation:
When an equal number of atoms of an element is present on both sides of a chemical equation, the equation is balanced.
What is the mass of 8.23 x 10^23 atoms of Ag
Answer:
[tex]\boxed {\boxed {\sf Approximately \ 147 \ g\ Ag}}[/tex]
Explanation:
Convert Atoms to Moles
The first step is to convert atoms to moles. 1 mole of every substance has the same number of particles: 6.022 ×10²³ or Avogadro's Number. The type of particle can be different, in this case it is atoms of silver. Let's create a ratio using this information.
[tex]\frac{6.022*10^{23} \ atoms \ Ag}{1 \ mol \ Ag}[/tex]
We are trying to find the mass of 8.23 ×10²³ silver atoms, so we multiply by that number.
[tex]8.23 *10^{23} \ atoms \ Ag *\frac{6.022*10^{23} \ atoms \ Ag}{1 \ mol \ Ag}[/tex]
Flip the ratio so the atoms of silver cancel. The ratio is equivalent, but places the other value with units "atoms Ag" in the denominator.
[tex]8.23 *10^{23} \ atoms \ Ag *\frac{1 \ mol \ Ag}{6.022*10^{23} \ atoms \ Ag}[/tex]
[tex]8.23 *10^{23} *\frac{1 \ mol \ Ag}{6.022*10^{23} }[/tex]
Condense into one fraction.
[tex]\frac{8.23 *10^{23} }{6.022*10^{23} } \ mol \ Ag[/tex]
[tex]1.366655596 \ mol \ Ag[/tex]
Convert Moles to Grams
The next step is to convert the moles to grams. This uses the molar mass, which is equivalent to the atomic mass on the Periodic Table, but the units are grams per mole.
Ag: 107.868 g/molLet's make another ratio using this information.
[tex]\frac {107.868 \ g \ Ag}{1 \ mol \ ag}[/tex]
Multiply by the number of moles we calculated.
[tex]1.366655596 \ mol \ Ag*\frac {107.868 \ g \ Ag}{1 \ mol \ ag}[/tex]
The moles of silver cancel out.
[tex]1.366655596 *\frac {107.868 \ g \ Ag}{1 }[/tex]
[tex]1.366655596 * {107.868 \ g \ Ag}[/tex]
[tex]147.4184058 \ g\ Ag[/tex]
Round
The original measurement of atoms has 3 significant figures, so our answer must have the same. For the number we calculated, that is the ones place.
147.4184058The 4 in the tenths place tells us to leave the 7 in the ones place.
[tex]147 \ g\ Ag[/tex]
8.23 ×10²³ silver atoms are equal to approximately 147 grams.
Hydrogen is an element.
True
False
Answer:
True
Explanation:
Hydrogen is one of the most abundant elements in the universe so yes
Answer:
true
Explanation:
Hydrogen is an chemical element
Great Sand Dunes National Park in Colorado is famous for its giant sand dunes. Sand dunes are landforms that are found in deserts and on beaches. Visitors to the park can surf down the dunes on sleds or boards.
Which process causes the shape of these giant dunes?
A. deposition
B. erosion
C. weathering
D. waves
distinguish between electron and neutron
Answer:
Explanation:
Electrons are a type of subatomic particle with a negative charge
Neutrons are a type of subatomic particle with no charge (they are neutral)
If Lead (II) nitrate reacted with iron (III) acetate what would the balanced formula be?
Answer:
Explanation:
3Pb(ii)(NO3)2 + 2Fe(iii) ( C2H3O2 )3 ===> 3Pb( C2H3O2)2 + 2Fe(NO3)3
I know you have likely been given this as a homework assignment, but in real life I doubt you would be able to see any reaction taking place. The products are likely both soluble and both ionize, so I don't think you will get any kind of reaction taking place.
The equation however is balanced.
